Toolmaker&#39;s vise or clamp



June 21,1949. v J, FROBLOM 2,473,643

TOOLMAKER'S VISE OR CLAMP Filed Jan. 12, 1945 INVENTOR JOHN M. F0051 0M ATTORNEY Patented June 21, 1949 UN [TE-D S TATE S OFF FLIC E LTOOLMAKERS VISEOR' John Mf'Froblom, Holland, Mich.

Application January 12, 1945,senarmxmzsrs 1 Claim. "1

This invention relates in general to vises, and in particular to a toolmaker's vise or clamp of the kind adapted for use with a magnetic chuck, or with drilling operations.

One of the objects of the invention is to provide in such a vise simple and rapid means for adjusting the position of one of the jaws, the other jaw being adjusted by screw means.

Another object is to provide in a toolmakers vise a clear space between the jaws, so that in drilling or like operations there is no possibility of the vise being marred by a tool.

Another object is to provide in a toolmakers vise a jaw structure which will facilitate the holding of a work piece.

A yet further object is to provide a jaw structure which will insure against slipping of the work piece therein.

Other objects and advantages of the invention will be apparent from a study of the description hereinafter together with the drawings. It is understood, however, that the invention is not limited by the drawings, which merely show a preferred embodiment of the invention, nor otherwise than by the claim subjoined.

In the drawings:

Figure 1 is a plan view of the invention;

Figure 2 is a section taken along the lines 2-2 in Figure 1;

Figure 3 is a view looking in the direction of the arrows 33 in Figure 1; and

Figure 4 is a section taken substantially along the lines 44 in Figure 1.

Referring particularly to Figure 1 the toolmakers vise or clamp comprises a crosshead Ill supporting a pair of side members I2, M, which in turn support jaws l6 and I8. Adjustment of jaw I6 is provided by a screw turning in the crosshead I0. Screw 20 is turned by a slip-crank 22, and is fastened to jaw l6 by means of a screw 24, which is jammed to the bottom of a tapped hole 26 in screw 20.

Means are provided for rapid adjustment of jaw l8, and to this end the side members I2, I 4 have on the proximate sides thereof a plurality of slots 28 spaced at regular intervals, any transversely spaced pair of which can be engaged by a swivelable member 30 fastened to the exterior face of jaw [8 by means of nut, bolt and. locking washer means, in the manner shown or in any other convenient manner.

To the end that the vise or clamp can hold securely objects having rather large dimensions of breadth and width as compared with depth, and to the end that the work piece to be held in the yise canntit *ellp "downwardly as during a surface grinding operation while the vise and work piece are supported on a magnetic chuck, as shown in Figure 2, and also to the end that the work piece cannot slip out of the vise after the completion of a drilling operation, and as particularly shown in Fig. 4, the proximate faces of the jaws l6 and I8 are provided with work piece supports consisting of ledge surfaces 32 and 34 lying in the same plane and wall surfaces 36 and 38, which have a slight rake, generally about 2, in such a direction that pressure on the screw will cause the jaws l6 and 18 to exert a downward force, tending to hold th work piece securely.

The vise is also provided with another work piece support 40, 42 on the bottom side thereof, and of smaller dimension than the upper work support for the accommodation of smaller work pieces. It will readily be observed, of course, that the vise may be supported on either side.

The proximate faces of the jaws l6 and I8 are also provided, as shown in Figure 1, with a V-slot for the accommodation of round or square work pieces.

Since working in metals entails the accummulation of waste materials, chips and the like, the upper and lower surfaces of the jaws l6 and I8 are provided with relieved portions 44 which facilitate the placing of the vise on a chuck or other support.

Thus has been described a new and useful improvement in the art of toolmakers Vises or clamps which gives rapid adjustment, large clamping range without th use of a long screw, readiness of adaptation to work pieces of varying sizes and shapes, positive assurance that work pieces will not slip out and clear space between the jaw faces. While the invention has been described in terms of a preferred embodiment, its scope is not to be limited by the terms of said embodiment, nor otherwise than by the terms of the claim here appended.

I claim:

In a toolmaker's vise of the class described adapted for holding work pieces, a pair of work holding jaws, a pair of spaced side rail members for supporting said work holding jaws for longitudinal movement therealong, a cross head connecting one end of said side rail members and having a screw rotatable therein connected with one of said work holding jaws for moving said work holding jaw upon rotation of said screw, a plurality of spaced slots on the proximate faces of said side rail members, said slots having parallel proximate faces inclined at an angle to a plane containing said side rail members, a single parallelogram shaped swivelable plate member mounted on the other of said work holding jaws and having planar parallel surfaces on the extremities thereof inclined to the major axis of said single parallelogram shaped swivelable member for locking in said slots, the inclined faces of said spaced parallel slots of said side rail members and said planar parallel surfaces on the extremities of said arallelogram shaped swivelable plate member being adapted for contact upon rotation of said parallelogram shaped swivelable plate member to forma stop against further unintended rotative movement of said parallelogram shaped swivelable plate member and whereby said other work holding jaw may be rapidly adjusted in position on said side rail members and locked in position by said single parallelogram shaped swivelable plate member.

JOHN M. FROBLOM.

4 REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 167,572 Seaver Sept. 7, 1875 707,641 Rostochil Aug. 26, 1902 771,974 Eklundh Oct. 11, 1904 779,276 Strubing Sept. 12, 1905 825,171 Anderson July 3, 1906 1,018,035 De Leeuw Feb. 20, 1912 1,799,474 McChesney Apr. 7, 1931 1,823,537 Gaudreau Sept. 15, 1931 2,170,535 Marsden Aug. 22, 1939 FOREIGN PATENTS Number Country Date 618,262 France Dec. 10, 1926 

